Pinterest People Team interview questions

The recruiter reached out to me via LinkedIn to gauge my interest in a role on their people team. I had a great intro call with the recruiter, and then with the Head of the team. The recruiter reconnects after I reach out 5 days after the initial interview with the Head of the team to tell me they will know next steps the following week. Two days later the recruiter invites me to SF for an onsite, I respond over the weekend with my availability. 10 days past and I still have not heard back from the recruiter. On the 11th day and after I reached out- the recruiter mentions that maybe I need to have another video call before coming out- asks my availability and tells me he will get back in touch. I respond immediately. 7 days past- still no response from the recruiter- I follow up. Recruiter responds 3 days later saying - actually maybe we can do an in person. I state I have an offer. 5 days later, the recruiter responds and asks how long I could wait on the offer because I'm their top candidate- I respond a few weeks. Recruiter responds stating they would be ready to bring me on site. I respond 3 days later- ask to align on compensation before moving forward, and what the entire process could entail so that I could slow role my offer. Recruiter ghosts me. This was the most unprofessional interview experience ever. I understand that processes speed up and slow down, but the lack of professionalism and transparency from one HR person to another is unacceptable.